Section 3 – Configure ESX/ESXi Storage
- Objective 3.4 – Configure and Manage VMFS Datastores
QUESTION 41
Which of the following are accurate descriptions of the Predictive and Adaptive Schemes for placing VMFS datastores (Choose Two)?
A.The Adaptive Scheme utilizes a small number of large LUNs
B.The Predictive Scheme utilizes several LUNs with different storage characteristics
C.The Adaptive Scheme utilizes several LUNs with different storage characteristics
D.The Predictive Scheme utilizes a small number of large LUNs
Answer: AB
Explanation:
Making LUN Decisions.
In the predictive scheme, you:
* Create several LUNs with different storage characteristics. (B above)
* Build a VMFS volume in each LUN (label each volume according to its characteristics).
* Locate each application in the appropriate RAID for its requirements.
* Use disk shares to distinguish high-priority from low-priority virtual machines. Note that disk shares are relevant only within a given ESX Server host. The shares assigned to virtual machines on one ESX Server host have no effect on virtual machines on other ESX Server hosts.
In the adaptive scheme, you:
* Create a large LUN (RAID 1+0 or RAID 5), with write caching enabled. (A above)
* Build a VMFS in that LUN.
* Place four or five virtual disks on the VMFS.
* Run the applications and see whether disk performance is acceptable.
* If performance is acceptable, you can place additional virtual disks on the VMFS. If it is not, you create a new, larger LUN, possibly with a different RAID level, and repeat the process. You can use cold migration so you don’t lose virtual machines when recreating the LUN.
QUESTION 42
A VMFS datastore with several running virtual machines is nearing 100% capacity. An administrator intends to grow the datastore so that existing virtual machines will have room for re-sizing, thin provisioning and snapshots. Which action can be taken to provide additional capacity for these functions?
A.Use VMFS Volume Grow from the Datastore section in vCenter
B.Add an Extent to the existing Datastore from the Datastore section in vCenter
C.Add an Extent to the existing Datastore from an ESX Host running the virtual machines in the datastore
D.Use VMFS Volume Grow from an ESX Host running the virtual machines in the datastore
Answer: D
QUESTION 43
Which of the following statements characterize the VMware Virtual Machine File System (VMFS) (Choose Two)?
A.SCSI commands issued by virtual machines are passed through to the VMFS file system
B.The VMFS is optimized to run multiple virtual machines as a single workload
C.SCSI commands issued by virtual machines are translated at the virtualization layer to VMFS file operations
D.The VMFS prioritizes single virtual machine workloads for optimal performance
Answer: BC
QUESTION 44
What is the maximum number of VMFS datastores that can be configured per ESX Host?
A.1024
B.256
C.512
D.128
Answer: B
QUESTION 45
Which of the following is a valid object to add an extent to?
A.an existing VMFS or NFS datastore
B.an existing NFS datastore
C.an existing VMFS datastore
D.an available unused storage volume
Answer: C
Explanation:
What’s New in VMware vSphere 4.0 .
vStorage VMFS Volume Grow – vCenter Server 4.0 allows dynamic expansion of a VMFS volume extent to add capacity to an existing datastore. VMFS Volume Grow is a new method for expanding a datastore without disrupting running virtual machines. After a LUN that backs that datastore is expanded through an array management utility, the administrator can use VMFS Volume Grow to expand the VMFS extent on the expanded LUN.
QUESTION 46
When you delete a VMFS datastore, it is destroyed and disappears from?
A.only the host that you have deleted it from
B.the storage device containing the datastore
C.all hosts in the same DRS/HA cluster
D.all hosts with connectivity to the datastore
Answer: D
QUESTION 47
Which of the following is information that can be obtained about a VMFS Datastore using Storage Views in the vSphere Client (Choose Two)?
A.vmhba Adapter used to access the datastore
B.Runtime Name of the datastore
C.Multipathing Status for the datastore
D.Space Used in the datastore
Answer: CD
QUESTION 48
How are new LUNs discovered by ESX Server?
A.A reboot operation is required to detect newly presented LUNs.
B.ESX Server automatically detects new LUNs as they are presented.
C.ESX Server periodically performs a rescan operation to detect any new LUNs.
D.A rescan operation is required every time a new LUN is added.
Answer: D
Explanation:
iSCSI SAN Configuration Guide, page 26.
The VMkernel discovers LUNs when it boots, and those LUNs are then visible in the vSphere Client. If changes are made to the LUNs, you must rescan to see those changes.
* New LUNs created on the iSCSI storage
* Changes to LUN access control
* Changes in connectivity
QUESTION 49
What file systems will be mounted under /vmfs/volumes?
A.all partitions not allocated to the Service console
B.all partitions allocated to the VMkernel
C.all partitions listed in the /etc/fstab
D.all partitions that have a VMFS file system
Answer: D
QUESTION 50
Which three storage solutions are supported for the placement of a VMFS file system during the installation of the ESX Server? (Choose Three.)
A.SCSI
B.SAN
C.ATA RAID
D.SCSI RAID
E.ATA
Answer: ABD
QUESTION 51
What is the maximum virtual disk size on a VMFS-3 volume? Select the best answer
A.512 GB
B.3.6 TB
C.1 TB
D.2 TB
Answer: D
Explanation:
File size (block size=8MB) 2TB minus 512B)
QUESTION 52
What is the minimum supported hardware requirement to run a VirtualCenter server?
A.2 GHz CPU
B.at least one Gigabit Ethernet adapter
C.512 MB RAM unless running a database server on the same machine
D.150 MB free disk space
Answer: A
QUESTION 53
On the DRS cluster, which three steps are part of the process of creating a virtual machine (VM) in VirtualCenter 4.0? (Choose three.
A.connect the CD-ROM drive to your OS disk image
B.select the group folder within the server farm in which you want the VM to reside
C.choose whether you are creating a “Typical” or “Custom” VM
D.select the resource pool in which you want to run the VM
E.select a datastore in which to store the VM files
Answer: CDE
